Volume control has stopped working after approx 8 months with no issue.
I have a RPI 3B+ running Volumio 2.773, connected via USB to an SMSL M100 DAC which has analog RCA outputs to my AMP.
The volume level appears to change in the volumio interface, but the sound level does not change coming out of my AMP.
I did notice that the Mixer Type in Settings > Playback Options had changed (for some reason) to undefined.
I changed it back to hardware, saved settings, but this did not fix issue.
I have rebooted both the DAC and the RPI, but the issue remains.
Any ideas ?